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Goodwill
 9 Months Ended
Jun. 30, 2011
Goodwill  
Goodwill

6.     GOODWILL

Changes to the carrying amount of consolidated goodwill by segment for the nine months ended 30 June 2011 are as follows:

 

      30 September
2010		      Acquisitions and
Adjustments		      Currency
Translation		      30 June
2011		  

Merchant Gases

      $595.7         $—         $39.1         $634.8   

Tonnage Gases

      15.5         —         1.0         16.5   

Electronics and Performance Materials

      303.4         2.0         12.4         317.8   
       $914.6         $2.0         $52.5         $969.1   

Goodwill is subject to impairment testing at least annually. In addition, goodwill is tested more frequently if a change in circumstances or the occurrence of events indicates that potential impairment exists.